diff --git a/project/build.properties b/project/build.properties
index 3040987151..04267b14af 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.9.4
+sbt.version=1.9.9
diff --git a/samples/akka-http-quickstart-scala/project/build.properties b/samples/akka-http-quickstart-scala/project/build.properties
index 3040987151..04267b14af 100644
--- a/samples/akka-http-quickstart-scala/project/build.properties
+++ b/samples/akka-http-quickstart-scala/project/build.properties
@@ -1 +1 @@
-sbt.version=1.9.4
+sbt.version=1.9.9